A petrol bomb was hurled inside the office of a prominent vernacular newspaper house in the city tonight by unkonwn attackers. The bomb broke a window pane and exploded inside the newsroom of Nongsain Hima, a Khasi daily, at around 9 pm, creating panic in the area. A DTP operator sustained minor injuries, while twocomputer sets and a scanner were damaged, editor Lam Thabah told PTI. Police officials led by DSP Vivek Syeim have rushed to the spot. They said office staff claimed to have saw a man running after lobbing the bomb. SP (City) Claudia Lyngwa said as of now, nothing can be said and investigation were on.